Sharp VZ-3000H User manual

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2

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SHARP

SERVICE

MANUAL

ATSM68

107

1MCT

VZ-3000H/E_

CP-V300H

VZ-3000H/E

CP-V300H

In

the

interests

of

user-safety

the

set

should

be

restored

to

its

original

condition

and

only

parts

identical

to

those

specified

be

used,

(The

record

in

the

photo

is

not

an

accessory.)

Main

Unit:

VZ-3000H

Speaker

Box:

CP-V300H

OO

®

@

APSs

Noise

reduction

system

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

“Dolby”

and

the

double-D

symbol

are

trademarks

eee

of

Dolby

Laboratories

Licensing

Corporation.

:

Auto

Program

Search

System

Photo

\

INDEX

TO

CONTENTS

FEATURES»

s.ss.g0hasbisascccawid

sat eee

te

Sree

danas

aa

eee

Top.

ADJUSTMENT

OF

TUNER

CIRCUIT

..........

18

~20

SPECIFICATIONS

........2c

cscs

eeenee

eset

eneonn

2

CP-V300H

(SCHEMATIC

DIAGRAM/WIRING

VOLTAGE

SELECTION

.......ccccececn

cece

ee

eees

2

CONNECTION/EXPLODED

VIEW)...............

20

NAMES

OF

PARTS

.....

cc

cece

ceee

cree

e

rene

enone

3

SCHEMATIC

DIAGRAM

(1/4

~

4/4)

..........

21

~28

DISASSEMBLY

........

ccc

eee

ee

eee

eee

eee

4~6

WIRING

SIDE

OF

P.W.

BOARD

(1/3

~

3/3)

....

29

~34

DIAL

CORD

STRINGING

..........00e

eee

e

ee

eens

6

EXPLODED

VIEW

(PLAYER/CABINET/

SETTING

OF

PLAYER

WIRE

......-...00es

cere

eens

6

TAPE

DECK)

....--.seeeeseene

near

esnee

35

~39

BLOCK

DIAGRAM

.....

ce

cece

cece

ene

recente

ees

7

EQUIVALENT

CIRCUIT

CIRCUIT

DESCRIPTIONS

.........00--0e0e

eee

8~14

{BLOCK

DIAGRAM)

OF

IC

...............

40

~

42

ADJUSTMENT

OF

TAPE

DECK

MECHANISM

....

14,

15

TYPES

OF

TRANSISTOR

AND

LED

...........-...

42

ADJUSTMENT

OF

PLAYER

MECHANISM

.....

15~17

GAUTION

2204)

ses

ckiedieed

aching

ets

cna

coca

nine

ae

%

43

ADJUSTMENT

AND

CHECK

OF

RECORD/

AC

POWER

SUPPLY

CORD

WIRING

CONNECTIONS

,.

43

PLAYBACK

AMPLIFIER

CIRCUIT

...........--.

17

-

REPLACEMENT

PARTS

LIST

...............

44

~Back

PACKING

METHOD............ccee

eee

cece

eens

Back

FEATURES

<VZ-3000H/E>

<CP-V300H>

®

Automatic

playing

of

both

sides

of

a

record.

@

Atthe

speaker

section:

e

Fully

automatic

control

of

the

record

with

microcomputer

Bass

ref.

type

2-way

speaker

system

and

linear

tracking

mechanism.

16

cm

free

edge

woofer

®

Compact,

space-saving

vertical

player.

LC

type

network

SHARP

CORPORATION

OSAKA,

JAPAN

@

For

a

complete

description

of

the

operation

of

unit,

please

refer

to

the

operation

manual.

<VZ-3000H/E>

General

Rated

voltage:

Power

consumption:

Dimensions

(Main

unit):

Weight

(Main

unit):

Input

sockets:

Quiput

sockets:

Outer

sockets:

Semiconductors:

Amplifier

Section

Circuit:

Power

output:

Total

harmonics

distortion:

Frequency

response:

Tone

controls:

Tuner

Section

Circuit:

Frequency

range:

Intermediate

frequency:

Sensitivity:

Separation:

S/N:

<CP-V300H>

Speaker

Section

Cabinet

type:

Speakers:

Frequency

range:

Crossover

frequency:

SPECIFICATIONS

AC

110

V,

220

V,

240

V,

50/60

Hz

230

W

597(W)

x

170(D)

x

378(H)

mm

14.6

kg

Microphone:

1

mV/10K

ohms,

$6.3

mm

jack

Aux

(P.B.):

190

mV,

47K

ohms

Aux

(REC):

130

mV,

100K

ohms

Speaker:

4

ohms

Headphones:

8

ohms,

46.3

mm

jack

FM

antenna:

FM

300

ohms

balanced

MW/LW

antenna:

outside

antenna

Ground:

MW/LW

antenna

ground

1

LSI,

17

ICs,

1

FET,

54

transistors,

56

diodes,

7

LEDs,

2

photo-

transistors,

3

photo-interruptors

2

infrared

emitting

diodes

OCL

power

amp

with

+

power

supply

RMS;

25W

x

2

at

0.5%

THD,

4

ohms

0.1%

(4

ohms

at

20W

output)

40

Hz

~20

kHz

+1.5

dB

Bass:

+9

d8

(100

Hz)

Treble:

+9

dB

(10

kHz)

Superheterodyne

FM/MW/LW

tuner,

PLL

stereo

demodulaticn

circuit,

FM

muting

circuit

built-in

FM:

87.6

~108

MHz

MW:

520

~1,620

kHz

LW:

148.5

~285

kHz

[VZ-3000H]

150

~

285

kHz

[VZ-3000E]

FM:

10.7

MHz

MW/LW:

455

kHz

[VZ-3000H]

465

kHz

[VZ-3000E]

FM:

2.0uV

at

S/N

26

dB,

40

kHz

dev.

MW/LW:

350uV/m

FM:

36dB

(1

kHz

FM

stereo)

FM:

70dB

(monaural

1

kHz)

Bass

ref.

type

2-way

speaker

system

16

cm

free

edge

woofer

5

cm

tweeter

60

~

20,000

Hz

2,500

Hz

Woofer

high-cut;

6

dB/oct

Tweeter

low-cut;

12

dB/oct

VOLTAGE

SELECTOR

ADJUSTMENT

The

voltage

selector

is

located

on

the

rear

panel

of

the

deck.

If

adjustment

is

necessary,

use

a

screwdriver

in

order

to

turn

the

selector

in

either

direction

until

the

correct

voltage

figure

is

displayed

in

the

window

next

to

the

adjustment

screw.

Cassette

Deck

Section

Recording

tracks:

Recording

system:

Erasing

system:

Head:

Motor:

Tape

speed:

Fast

forward

time:

Rewind

time:

Wow

&

flutter:

Frequency

response:

S/N:

Player

Section

Type:

Motor:

Drive

system:

Speeds:

Wow

&

Flutter:

S/N:

Tonearm:

Cartridge:

Supplied

devices:

Maximum

rated

input:

Impedance:

Sound

pressure

level:

Dimensions:

Weight:

4

track

2

channel

stereo

system

AC

bias

(85

kHz)

AC

erasing

system

(85

kHz)

Record/playback

head

x

1,

Erase

head

x

1

Electronic

control

DC

motor

4.8

cm/sec.

100.sec.

(C-60

tape)

.

100.sec.

(C-60

tape)

0.2%

(DIN).

Normal

tape:

.30

~

14,000

Hz

Chrome

tape:

30

~

15,000

Hz

Metal

tape:

30

~16,000

Hz

Dolby

NR

off:

.

52

dB

Dolby

NRon:

62dB

{Metal

tape,

over

5

kHz)

Microcomputer

control,

Linear

tracking

full

auto,

Belt

drive

DC

motor

with

FG

(for

platter

drive)

x1,

DC

motor

(for

tonearm

drive)

x

1

Belt

drive

system

33-1/3,

45

rpm

0.085%

(DIN)

66

dB

(DiN-B)

Dynamic

balanced,

Linear

tracking

VM

type

Frequency

response:

20

~

20,000

Hz

Output

voltage:

2.8

mV

(1

kHz,

50mm/sec.)

Exchangeable

stylus:

STY-121

Automatic

door

open/close,

auto

lead-in,

auto

return,

auto

record

size

sensing,

automatic

speed

selec-

tion,

dual

play,

repeat

play

50

W

(MPQ)

4

ohms

89

dB/Wm

220{W)

x

220(D)

x

378(H)mm

4.7kgx1

*

Specifications

for

this

model

are

subject

to

change

without

prior

notice.

<VZ-3000H/E>

2

Front

Parts

23

Tape

Deck

Parts

24

35

Control

Parts

36

37

38

39

40

41

42

43

44

Rear

Parts

45

46

47

48

49

50

51

<CP-V300H>

Speaker

Parts

%

1

Tweeter

2

Woofer

NAMES

OF

PARTS

Power

Switch

Side

B

Play

Indicator

Dual

Play

{ndicator

Repeat-Play

Indicator

Side

A

Play

Indicator

Player

Door

Signal

Meter

FM

Stereo

Indicator

Function

Selector

Buttons

Volume

Control

Knob

Tuning

Control

Knob

Tape

Counter

Tape

Counter

Reset

Button

Player

Door

Open/Close

Key

Play/Cut

Key

Tonearm

Cue

Key

Tonearm

Forward

Key

Tonearm

Reverse

Key

Dual

Play

Key

Repeat-Play

Key

Side

A/B

Selector

Key

Headphones

Jack

Microphone

Jacks

APSS

Indicator

Dolby

NR

Indicator

29-3031

32

39°34

36

is

ab

a

6

QD

Record

Indicator

Figure

3-2

Tape

Deck

Parts

Figure

3-3

Contro!

Parts

Cassette

Holder

Tape

Level

Meter

Cassette

Eject

Button

Record

Button

Play

Button

Stop

Button

Rewind

Button

Fast

Forward

Button

Pause

Button

ig

oa

@

Speed

(33/45)

Selector

Key

Dolby

NR

Switch

Tape

Selector

Switches

Loudness

Switch

Record

Level

Control

Knobs

Bass

Control

Knob

Treble

Control

Knob

i

Balance

Contro!

Knob

i

ah

4

4

Mic

Mixing

Knob

Antenna

Sockets

AUX

(REC/P.B.)

input

Socket

Hole

to

open

player

door

in

case

of

power

failure.

Speaker

Socket

Beat

Cancel

Switch

AC

Power

Supply

Cord

Voltage

Selector

Figure

3-5

Speaker

Parts

pal

Yee

DISASSEMBLY

Cautions

on

Disassembly

ance:

outlet

before

starting

to

disassemble

the

set.

2.

Take

cassette

tape

and

record

out.of

the

unit.

<VZ-3000H/E>

REMOVAL

OF

DUST

COVER

1,

Remove

two

screws

from

the

dust

cover.

See

Figure

4-1.

2.

Pull

out

the

dust

cover

in

the

arrow

direction

shown

in

Figure

4-1,

holding

its

lower

part.

REMGVAL

OF

PLAYER

DOOR

FRONT

COVER

1.

Remove

the

dust

cover

in

the

same

way

as

in

“Al

REMOVAL

OF

DUST

COVER.”

2.

Remove

six

hocks

shown

in

Figure

4-2,

and

pull

out

the

play

door

front

cover

(its

upper

half

must

be

taken

off

first

and

then

its

lower

half.)

[C]

REMOVAL

OF

REAR

LID

1.

Remove

ten

screws

at

the

rear

lid

shown

in

Figure

4-3,

and

take

it

off.

[D]

REMOVAL

OF

CABINET

1.

Remove

the

dust

cover

and

rear

lid

in

the

same

ways

as

in

“TA]

REMOVAL

OF

DUST

COVER"

and

“{C]

REMOVAL

OF

REAR

LID.”

2.

Disconnect

two

connectors

(JCN901,

JCN902)

shown

in

Figure

4-4,

3.

Remove

eight

screws

at

the

cabinet

shown

in

Figure

4-4.

4.

Pull

out

eight

knobs

shown

in

Figure

4-5,

and

depress

the

cassette

eject

button

to

open

the

cassette

holder.

5.

Push

the

door

lever

shown

in

Figure

4-4

with

a

pencil

or

the

like,

and

open

the

door.

6.

Bring

down

the.

set

with

its

rear

side

facing

downwards,

remove

eight

screws

from

the

cabinet,

and

take

out

the

cabinet

by

holding

its

both

sides:

do

not

touch

the

player

door.

See

Figure

4-5.

*

For

easier

removal

of

the

cabinet,

it

is

advised.

to

remove

two

screws

at

the

player

mechanism.

[E]

REMOVAL

OF

PLAYER

MECHANISM

1.

Remove

the

cabinet

in

the

same

way

as

in

“[D]

REMOVAL

OF

CABINET.”

2.

Remove

two

holders

from

the

P.W.

Board

(PWB-B2)

shown

in

Figure

5-2.

3.

Pull

out

two

sockets

(CNS13,

CNS514)

shown

in

Figure

5-1.

4,

Remove

six

screws

from

the

player

mechanism

shown

in

Figure

5-1,

and

take

the

mechanism

off.

{F]

REMOVAL

OF

TAPE

MECHANISM

1.

Remove

the

cabinet

in

the

same

way

as

in

“(D]

REMOVAL

OF

CABINET.”

2.

Pull

out

four

sockets

(CNS201,

CNS852)

shown

in

Figure

5-3.

3.

Remove

four

screws

from

the

tape

mechanism

shown

in

Figure

5-2

and

counter

belt,

and

take

the

mechanism

off.

CNS202,

CNS851,

[G]

REMOVAL

OF

CASSETTE

HOLDER

1.

Remove

the

cabinet

in

the

same

way

as

“(DI

REMOVAL

OF

CABINET.”

Follow

the

below-mentioned

notes

when

disassembling

the

set

and

reassembling

it,

to

keep

its

safety

and

excellent

perform-

1.

Be

sure

to

remove

the

power

supply

plug

from

the

wall

3.

Take

off

nylon

bands

or

wire

holders

where

they

need

be

removed

when

disassembling

the

set.

After

repairing

the

set,

be

sure

to

rearrange

the

leads

at

where

they

have

been

before

disassembling.

4.

Take

sufficient

care

on

station

electricity.

of

integrated

circuits

and

other

circuits

when

repairing.

Figure

4-4

Figure

4-5

2.

Detach

the

control

indication

plate

shown

in

Figure

5-4,

by

removing

binding

agent

and

four

hooks.

Remove

one

screw

from

the

cassette

holder,

and

take

the

holder

off.

*

At

left

of

the

cassette

holder

there

is

a

spring.

*

When

reassembling

the

contro!

indication

plate,

secure

it

with

binding

agent.

a

a

[H]

REMOVAL

OF

CONTROL

LID

1.

Remove

the

cabinet

in

the

same

way

as

in

“(D]

REMOVAL

OF

CABINET.”

2.

Push

the

control

lid

at

its

w

marked

portion,

and

open

it.

3,

Push

the

control

lid

in

the

arrow

direction

shown

in

Figure

5-4,

and

remove

it

(first

the

part

(1)

and

then

the

part(2)).

*

Remove

the

spring

at

right

of

the

control

lid.

[i]

REMOVAL

OF

P.W.

BOARDS

*

Prior

to

disassembling

each

P.W.B.,

remove

the

cabinet

in

the

same

way

as

in

“[D]

REMOVAL

OF

CABINET.”

1.

Control

P.W.B.

(PWB-D2)

@

Remove

three

screws

from

the

P,W.B.

shown

in

Figure

5-2,

and

take

it

off.

2.

Tape

deck

P.W.B.

(PWB-D5)

@

Remove

three

sockets

(CNS201,

CNS202,

CNS203)

and

four

screws

from

the

P.W.B.,

and

take

it

off.

3.

Tuner

P.W.B.

(PWB-D1)

@

Remove

seven

function

selector

buttons

shown

in

Figure

5-2

from

the

left

side

by

using

a

screwdriver,

without

injuries

to

the

buttons.

Then

remove

two

screws

and

dial

cord.

®

Remove

three

screws

and

one

socket

(CNS101)

from

the

P.W.B.

shown

in

Figure

5-3,

and

take

it

off.

4.

Power

P.W.B.

(PWB-C2)

with

heat

sink

@

Remove

one

socket

(CNS401)

and

six

screws

fromthe

PWB

and

heat

sink

shown

in

Figure

5-3,

and

take

the

P.W.B.

(with

heat

sink)

off.

5.

Power

block

(PWB-C1)}

@

Remove

seven

screws

from

the

power

block

shown

in

Figure

5-3,

and

take

it

off.

Note:

*Remove

two

screws

and

five

push-rivets

from

the

insulating

cover,

*

When

replacing

the

power

IC

or

transistor,

apply

silicon

grease

between

it

and

heat

sink.

6.

Speaker

socket/beat

cancel

switch

P.W.B,

(PWB-C7,

PWB-

D6)

@

Remove

two

screws

from

the

bracket

shown

in

Figure

5-3,

7.

LED

drive

P.W.B.

(WPB-C3)

@

Remove

one

socket

(CNS901)

and

two

screws

from

the

P.W.B.

shown

in

Figure

5-3,

and

take

it

off.

8.

Signal

meter

P.W.B,

(PWB-C6)

@

Remove

one

socket

(CNS101)

and

one

screw

from

the

P.W.B.

shown

in

Figure

5-3,

and

take

it

off.

9.

Microphone

jack

P.W.B.

(PWB-D3)

@

Remove

two

nuts

from

the

P.W.B.

shown

in

Figure

5-2,

and

take

it

off.

10.

Volume

P.W.B.

(PWB-D4)

@

Remove

one

nut

from

the

P.W.B.

shown

in

Figure

5-2,

and

take

it

off.

11,

Headphones

jack

P.W.B.

(PWB-C4)

@

Remove

one

nut

from

the

headphone

jack

shown

in

Figure

5-2.

Then

take

the

headphone

jack

P.W.B.

off.

12.

Meter/tape

indicator

P.W.B.

(PWB-C9,

PWB-C8)

@

Remove

four

screws

from

the

P.W.B.

shown

in

Figure

5-5,

and

take

it

off.

13.

DIN

Socket

P.W.B.

(PWB-D7)

@

Remove

two

hooks

from

the

antenna

terminal

bracket,

shown

in

Figure

5-3,

and

take

it

off.

@)

pte

——_

CONTROL

LID

fA}

~Sey

Figure

5-4

5

3

PLAYER

MECHANISM

Figure

5-5

14.

Tape

mechanism

P.W.B.

(PWB-E)

®@

Remove

the

tape

mechanism

in

the

same

way

as

in

“(F]

Me

saet

er

Fe

pe

Ge

REMOVAL

OF

TAPE

MECHANISM.”

re

@

Remove

one

screw

from

the

record

selector

lever,

two

screws

from

the

motor

bracket

and

one

screw

from

the

P.W.B.

shown

in

Figure

6-1.

Then

take

the

P.W.B.

off.

15,

Microcomputer

P.W.B.

(PWB-B1)

@

Remove

the

player

mechanism

in

the

same

way

as

“(E]

REMOVAL

OF

PLAYER

MECHANISM.”

®

Remove

four

screws

from

the

P.W.B.

shown

in

Figure

6-2,

and

take

it

off.

Figure

6-2

<CP-V300H>

REMOVAL

OF

SPEAKER

BOX

1.

Speaker

net

@

As

shown

in

Figure

6-3,

pull

the

net

in

the

arrow

directions

in

the

numerical

order

(1),

(2),@)

and

().

The

parts

@

and

must

be

removed

by

using

a

bladed

screwdriver.

Figure

6-3

2.

Speaker

slated

@

For

removal

of

the

speaker,

see

Figure

20-4.

screwdriver

DIAL

CORD

STRINGING

cm.

@

Setting

order:

®

1.

Turn

the

drum

fully

counterclockwise

{at

the

highest

TY

hy

een!

|.

—

see

nn

frequency

position},

and

put

a

hook

of

the

spring

in

the

hole

of

the

drum.

2.

Proceed

with

stringing

in

the

numerical

order

from

1)

to

®.

Pointer

iaazt

3.

After

the

stringing,

turn

the

dial

drive

shaft

fully

counter-

ai

2

<

.

ae

.

.

uM

(472;

clockwise

(at

the

lowest

frequency

position),

and

align

the

=

:

center

of

the

pointer

to

zero

point

of

the

dial

scale

plate.

“O'Point

Cf

2Turns

4Turns

Figure

6-4

SETTING

OF

PLAYER

WIRE

®

Setting

order

Pe

eae

aera

1.

Set

the

drum

at

its

rest

position,

and

put

a

hook

of

the

spring

in

the

hole

of

the

drum.

2.

Stretch

the

wire

in

the

numerical

order

from

to

(2.

3.

After

setting

the

wire,

set

the

side

A

tonearm

and

side

B

tonearm

at

their

lead-in

positions.

Refer

to

the

instructions

in

“POSITIONAL

ADJUSTMENT

OF

TONEARM

LEAD-

®

IN

POSITION.”

—

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(273)

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y°

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(3

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Tonearm

@

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(2a)

'

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1903mm

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CIRCUIT

DESCRIPTIONS

<OUTLINE

OF

PLAYER

CONTROL

SECTION

>

KEY

CONTROL

SECTION

This

section

is

made

up

of

nine

keys,

and

each

key

is

of

the

lock-out

type

and

its

chattering

time

is

limited

to

40

msec.

1.

Player

door

open/close

key

Key

for

opening

and

closing

the

player

door.

2.

Play/cut

key

Enables

to

begin

playing

a

record

and

to

stop

it

while

it

is

playing

—

this

is

effective

when

the

player

door

is

closed.

When

the

tonearm

is

at

its

rest

position

(at

right

for

side

A,

or

at

left

for

side

B),

player

operation

starts

when

this

key

is

pushed:

when

the

tonearm

is

not

at

its

rest

position,

the

key

functions

as

cut

key.

3.

Tonearm

cue

key

Enables

cue

up

and

cue

down

motion

of

the

tonearm

while

a

record

is

being

played.

It

is

used

to

keep

or

cancel

cue

up

mede

when

the

set

is

not

playing

a

record.

4.

Side

A/side

B

selector

key

Changes

side

A

play

and

side

8

play.

With

this

change,

the

tonearm

moves

to

a

lead-in

position,

which

results

in

playing

of

the

back

side

of

a

record

which

you

are

listening

to.

5.

Tonearm

forward

key

Enables

to

move

the

tonearm

toward

the

optional

portion

on

a

record

(to

later

selections}.

The

tonearm

can

move

until

pushing

the

key

is

stopped.

6.

Tonearm

reverse

key

Enables

to

move

the

tonearm

back

to

the

optional

portion

on

a

record

(to

previous

selections).

The

tonearm

can

move

until

pushing

this

key

is

stopped.

7.

Speed

(33/45)

selector

key

Enables

to

manually

change

the

speed

for

a

record.

8.

Dual

play

key

Enables

to

play

side

A

(or

side

B}

followed

by

automatic

play

of

side

B

(or

side

A).

The

dual

play

is

cancelled

by

pushing

the

key

again.

9.

Repeat

play

key

Enables

to

repeat

play

of

side

A

or

side

B.

The

repeat

play

is

cancelled

by

pushing

the

key

again.

SENSOR

SECTION

1.

Player

door

open

sensor

The

skelton

switch

detects

that

the

play

door

is

opened

completely.

2.

Player

door

close

sensor

The

skelton

switch

detects

that

the

player

door

is

closed

completely.

3.

EP

record

misload

sensor

The

microswitch

finds

an

error

that

an

EP

record

is

loaded

in

the

LP

record

holder.

4.

Tonearm

rest

position

sensor

The

skelton

switch

detects

that

the

tonearm

is

at

its

rest

position

(at

right

for

side

A,

at

Seft

for

side

B).

5.

Tonearm

position

sensor

When

the

tonearm

is

out

of

its

rest

position,

the

photo-

sensor

produces

four

pulses

to

detect

how

far

from

the

rest

position

the

tonearm

is

situated.

&.

EP/LP

sensor

With

the

player

door

closed,

the

photosensor

works

to

detect

that

an

EP

or

LP

record

is

loaded

or

that

neither

is

loaded.

INDICATOR

SECTION

1.

Side

A

play

indicator

Lights

up

when

side

A

play

is

instructed

by

the

side

A/side

B

selector

key

and

when

side

A

of

a

record

is

being

played.

2.

Side

B

play

indicator

Lights

up

when

side

B

play

is

instracted

by

the

side

A/side

B

selector

key

and

when

side

B

play

of

a

record

is

being

played.

3,

Dual

play

indicator

Lights

up

when

dual

play

is

instructed

by

the

dual

play

key

and

when

side

A

(or

side

B)

of

a

record

is

played

followed

by

automatic

playing

of

side

B

(or

side

A).

4,

Repeat

play

indicator

Lights

up

when

repeat

play

is

instructed

by

the

repeat

play

key

and

when

a

record

is

played

repeatedly.

Each

indicator

lights

up

when

it

receives

“high”

level

signal

from

the

microcomputer.

Figure

8-1

Dua!

play

indicator

Repeat

play

indicator

ie

4

play

indicator

Figure

8-2

TONEARM

CONTROL

SECTION

Forward/reverse

motion

of

the

tonearm

and

also

its

up/down

motion

are

controlled

by

the

microcomputer’s

signals

to

be

applied

to

the

cartridge

motor

and

tonearm

solenoid.

®

Output

signal

(D12)

for

side

B

tonearm

solenoid:

the

tonearm

moves

down

when

the

signal

is

at

“high”

level.

®

Qutput

signal

(D117)

for

side

B

tonearm

solenoid:

the

tonearm

moves

down

when

the

signal

is

at

“high”

level.

®

Output

signal

(D3)

for

cartridge

motor

low

speed

rotation:

the

motor

rotates

at

low

speed

when

the

signal

is

at

“low”

level.

®

Output

signal

(D4)

for

cartridge

motor

forward

rotation:

the

tonearm

rotates

forwards

when

the

signal

is

at

“low”

level.

®

Output

signal

(D5)

for

cartridge

motor

backward

rotation:

the

tonearm

rotates

backwards

when

the

signal

is

at

“low”

level.

PLAYER

DOOR

CONTROL

SECTION

Opening

and

closing

of

the

player

door

is

controlled

by

the

microcomputer’s

signals

to

be

applied

to

the

gear

changeover

solenoid

(to

change

the

gear

blocks)

and

to

the

cartridge

motor

(in

the

tonearm

control

section).

®

Output

signal

(D9)

for

gear

changeover

solenoid:

the

gear

blocks

are

changed

when

the

signal

is

at

“high”

jevel.

_3—-

®@

Output

signal

(D4)

for

cartridge

motor

forward

rotation:

the

cartridge

motor

rotates

forwards

when

the

signal

is

at

“low”

level

{with

the

player

door

opened).

®

Output

signal

(D5)

for

cartridge

motor

backward

rotation:

the

cartridge

rotates

backwards

when

the

signal

is

at

“low”

level

(with

the

player

door

closed).

*

The

cartridge

motor

rotates

at

any

time

at

high

speeds.

PHONO

MOTOR

CONTROL

SECTION

Side

A

or

side

B

play

is

selected

by

the

microcomputer's

signals

to

be

applied

to

the

phono

motor:

the

motor

rotates

forwards

for

side

A

play,

and

rotates

backwards

for

side

B

play.

®

Output

signal

(D6)

for

phono

motor

high-speed

rotation:

the

motor

rotates

at

high

speeds

(45

r.p.m.)

when

the

signal

is

at

“‘low’’

level.

@

Output

signal

(D7)

for

phono

motor

forward

rotation:

the

motor

rotates

forwards

when

the

signal

is

at

“low”

level.

®

Output

signal

(D8)

for

phono

motor

backward

rotation:

the

motor

rotates

backwards

when

the

signal

is

at

“low”

level.

MUTING

Muting

occurs

when

the

output

signal

(D10)

from

the

microcomputer

is

at

“high’’

level.

<

FUNCTIONS

OF

PLAYER

CONTROL

SECTION

>

WITH

POWER

ON

The

microcomputer

starts

operating

when

the

power

switch

is

turned

on,

and

the

VZ-3000H/E

is

first

set

as

follows:

1.

The

tonearm

returns

to

its

rest

position

if

it

has

been

at

the

other

position.

2.

Side

A

of

a

record

is

ready

to

be

played

when

the

player

door

has

been

locked

completely.

3.

When

the

player

door

has

been

closed,

the

microcomputer

detects

whether

there

is

a

record

in

the

compartment

or

not,

If

it

is

loaded,

its

side

A

is

ready

to

be

played:

in

the

case

of

EP

record,

the

speed

is

set

at

45

r.p.m.

and

in

the

case

of

LP

record

it

is

set

at

33

r.p.m.

If

an

EP

record

is

loaded

by,

mistake

in

the

LP

record

holder,

the

door

is

opened,

and

side

A

of

a

record

is

ready

to

be

played.

DOOR

OPEN

OPERATION

When

the

door

has

been

closed,

it

opens

when

the

player

door

open/close

key

is

operated

or

when

the

microcomputer

finds

that

an

EP

record

is

loaded

in

the

LP

record

holder.

1.

When

the

tonearm

is

out

of

its

rest

position

with

the

door

closed,

it

returns

to

the

rest

position,

then

the

door

is

allowed

to

open.

2.

All

the

indicators

are

put

off

while

the

door

is

opening.

When

the

opening

completes,

side

A

of

a

record

is

allowed

to

be

played.

*

Any

key

operation

is

impossible

while

the

door

is

opening.

DOOR

CLOSE

OPERATION

When

the

door

has

been

opened,

it

is

closed

when

the

player

door

open/close

key

is

operated:

it

is

impossible

when

the

tonearm

is

moving

forwards

or

backwards,

and

when

the

microcomputer

detects

that

an

EP

record

is

loaded

in

the

LP

record

holder.

1.

While

the

door

is

closing,

if

the

microcomputer

detects

EP

record

misloading,

the

door

stops

and

intends

to

open

again.

2.

When

the

door

is

closed

completely,

the

microcomputer

makes

the

tonearm

return

to

its

rest

position

if

it

has

been

at

the

other

position.

The

microcomputer

also

detects

whether

a

record

is

joaded

or

not

and,

if

loaded, playing

starts:

in

the

case

of

EP

record,

the

speed

is

set

at

45

r.p.m.,

and

in

the

case

of

LP

record,

the

speed

is

set

at

r.p.m.

All

the

indicators

go

off

where

no

record

is

loaded.

If

an

EP

record

is

misloaded

in

the

LP

record

holder,

the

door,

if

closed,

will

open.

PLAY

START

OPERATION

When

a

record

has

been

loaded

with

the

player

door

opened,

the

player

door

is

closed

when

the

player

door

open/close

key

is

operated,

then

playing

the

record

starts

automatically.

Where

the

tonearm

is

at

the

rest

position

and

a

record

has

been

loaded

with

the

player

door

closed,

playing

the

record

starts

when

the

play/cut

key

or

tonearm

forward

key

is

pushed.

When

playing

starts,

the

tonearm

moves

at

high

speeds

toward

its

lead-in

position

according

to

the

microcomputer’s

signals

to

decide

the

rotational

direction

and

speed

of

the

phono

motor;

then

the

tonearm

moves

down

to

the

record

(cue

up/down

operation).

*

At

the

lead-in

position,

the

tonearm

moves

forwards

when

the

tonearm

forward

key

is

pushed.

PLAY

CUT

OPERATION

Play

cut

operation

is

allowed

when

the

tonearm

is

away

from

its

rest

position

with

the

player

door

closed.

It

starts

when

the

play/cut

key

is

operated

or

when

the

player

door

open/close

key

is

pushed

to

open

the

door.

1.

All

the

indicators

other

than

side

A

or

side

B

indicator

go

off

while

the

play

cut

operation

is

performed.

2.

The

play

cut

operation

makes

the

tonearm

move

up

if

it

has

been

down

on

the

record

and

also

makes

the

phono

motor

stop

to

rotate.

TONEARM

FORWARD

OPERATION

When

the

player

door

is

opened:

The

tonearm

moves

forwards

when

the

tonearm

forward

key

is

pushed.

1.

When

the

tonearm

forward

key

is

pushed,

the

tonearm

advances

to

EP

lead-in

position,

and

moves

down

to

the

tecord

surface.

However,

if

the

tonearm

has

been

inside

the

EP

lead-in

position,

it

remains

where

it is

when

the

tonearm

forward

key

is

pushed

and

then

moves

down

to

the

record

surface.

\\\)

Record

Rest

position

Return

position

Read-in

position

Figure

9

When

the

player

door

is

closed:

The

tonearm

moves

forwards

when

the

tonearm

forward

key

is

pushed,

provided

that

a

record

is

loaded

and

that

the

tonearm

is

not

at

its

returning

process.

1,

When

the

tonearm

has

been

at

the

rest

position,

pushing

the

tonearm

forward

key

makes

the

tonearm

move

up

and

brings

it

to

its

lead-in

position.

After

the

lead-in

position,

the

tonearm

forward

speed

slows

down

but

the

tonearm

continues

to

move

inwards

unti!

pushing

the

key

is

stopped.

2.

After

the

forward

operation

completes,

the

tonearm

per-

form,

cue

up

or

down

operation

according

to

the

setting

of

tonearm

cue

key.

3.

If

the

tonearm

reaches

its

return

position

with

a

continuous

push

of

the

tonearm

forward

key,

it

automatically

starts

to

return

toward

the

rest

position.

TONEARM

BACKWARD

OPERATION

The

tonearm

moves

backwards

when

the

tonearm

reverse

key

is

pushed,

provided

that

the

tonearm

is

away

from

the

rest

position

and

the

pfayer

door

is

closed.

1.

Where

the

tonearm

is

placed

between

the

rest

position

and

lead-in

position,

play

operation

is

cut

when

the

tonearm

reverse

key

is

pushed.

Where

the

tonearm

is

at

any

place

between

the

lead-in

position

and

return

position,

the

tonearm

moves

backwards

when

the

tonearm

reverse

key

is

pushed.

3.

While

the

tonearm

is

moving

down,

pushing

the

tonearm

reverse

key

makes

the

tonearm

move

up

and

then

back-

wards

at

low

speed.

The

backward

motion

continues

until

pushing

the

key

is

stopped.

4.

After

the

backward

operation

completes,

the

tonearm

performs

cue

up

or

cue

down

operation

according

to

the

setting

of

the

tonearm

cue

key.

5.

If

the

tonearm

moves

back

until

it

reaches

the

place

between

the

lead-in

position

and

rest

position,

the

set

gets

in

repeat

play

mode

so

that

the

tonearm

again

moves

toward

the

lead-in

position

of

the

same

record

as

previously

played.

Then

the

tonearm

performs

cue

up

or

cue

down

operation

according

to

the

setting

of

the

tonearm

cue

key.

CUE

UP/CUE

DOWN

OPERATION

Record

play

stops

temporarily

when

the

tonearm

cue

key

is

pushed,

and

it

resumes

from

that

position

when

the

key

is

again

pushed.

Temporary

stop

of

record

play

is

called

cue

up

operation

while

its

restarting

is

cafled

cue

down

operation.

Cue

up

operation

changes

to

cue

down

operation

and

vice

versa

each

time

the

tonearm

cue

key

is

pushed.

®

Cue

down

operation

j.

Cue

up

state

is

cancelled

and

the

side

A

or

side

B

play

indicator

goes

off.

2.

Cue

down

operation

lasts

1

second,

and

2

seconds

later

the

muting

is

canceliled.

3.

If

the

tonearm

cue

key

is

pushed

while

the

cue

down

operation

is

performed,

cue

up

operation

starts.

®

Cue

up

operation

1.

Cue

up

operation

starts,

and

the

side

A

or

side

B

play

indicator

blinks

(with

approx.

3

Hz

signal).

2.

Cue

up

operation

lasts

1

second.

Muting

occurs

for

290

msec

before

cue

up

operation

has

started.

3.

It

is

not

possible

to

push

the

tonearm

cue

key

while

cue

up

operation

is

performed,

thus

no

cue

down

operation

being

allowed.

SIDE

A/B

SELECTION

Side

A

play

or

side

B

play

is

selected

by

pushing

the

side

A/B

selector

key.

During

cue

down

operation,

this

selection

starts

after

the

tonearm

has

been

raised

up.

1.

The

tonearm

returns

to

the

rest

position

and

then

moves

into

the

lead-in

position

of

the

back

side

of

the

record

you

are

listening

to.

Then

the

tonearm

will

perform

cue

up

or

cue

down

operation

according

to

the

setting

of

the

tonearm

cue

key.

2.

While

the

tonearm

is

returning

to

the

rest

position,

the

play

indicator

blinks

(with

approx.

3/2

Hz

signal)

to

show

that

the

back

side

of

the

record

you

are

listening

to

will

next

begin

playing

from

the

beginning.

3.

There

is

a

time

delay

of

about

1

second

when

the

phono

motor

changes

its

direction:

about

1

second

after

this

change,

the

motor

stops

and

then

restarts

rotating

in

the

reverse

direction.

And

it

takes

about

1

second

for

the

motor

to

be

set

at

its

normal

r.p.m.

These

time

delays

are

to

keep

a

safe

side

A/B

selection

of

a

record

to

be

played.

AUTO

RETURN

FUNCTION

When

side

A

or

side

B

play

is

finished,

the

tonearm

is

lifted

off

the

record,

it

goes

back

to

its

rest

position

and

the

record

stops

revolving.

If

the

tonearm

has

been

in

cue

down

position,

it

performs

cue

up

operation

and

returns

to

its

rest

position.

1.

If

only

the

repeat

play

key

has

been

pushed,

one

side

of

the

record

is

played

repeatedly.

tf

both

the

repeat

play

and

dual

play

keys

have

been

pushed,

both

sides

of

the

record

are

played

repeatedly.

2.

For

one

side

repeat

play,

when

side

A

(or

B)

is

finished,

the

tonearm

returns

to

the

rest

position

and

the

same

side

begins

playing

again

from

the

beginning.

For

dualside

repeat

play,

when

side

A

(or

B}

is

finished,

the

tonearm

returns

to

the

rest

position

and

the

side

B

{or

A),

or

the

back

side

of

the

record

you

are

listening

to,

begins

playing

from

the

beginning:

if

the

tonearm

cue

key

has

been

pushed,

the

tonearm

performs

cue

up

operation

before

playing

the

back

side

has

started.

3.

Unless

both

the

repeat

play

and

dual

play

keys

have

been

pushed,

the

tonearm

cue

key

once

pushed

is

ineffective

during

the

auto

return

operation.

4.

During

the

auto

return

operation

in

one

side

repeat

play,

the

play

indicator

blinks

(with

approx.

3/2

Hz

signal)

to

show

that

the

same

side

as

you

are

listening

to

will

begin

playing

again

from

the

beginning:

during

the

auto

return

Operation

in

dual

side

repeat

play,

the

play

indicator

blinks

{with

3/2

Hz

signal)

to

show

that

the

back

side

of

the

record

you

are

listening

to

will

begin

playing.

SIGNALS

FROM

SENSORS

TO

MICROCOMPUTER

1.

Detection

of

tonearm

position

Performed

by

using

SW504,

LEDS05

and

a

gear

drum.

SW504

is

the

sensor

which

detects

that

the

tonearm

is

at

the

rest

position.

LED505

is

the

sensor

which

detects

that

the

tonearm

is

at

the

lead-in

or

return

position.

The

outputs

from

these

sensors

are

shown

in

Figure

11-1,

which

are

applied

to

pin

(R13)

and

pin

(R12)

of

the

microcomputer.

2.

Detection

of

EP/LP

record

loading

or

no

loading

LED501

and

LED502

sense

whether

an

EP

or

LP

record

is

loaded

or

not

loaded,

and

their

outputs

which

are

shown

in

Table

10-1

are

applied

via

Q538_(for

EP

record)

or

Q539

(for

LP

record)

to

pins

@7)

and

of

the

microcomputer.

Table

10-1

LP

record

detection

EP

record

Load

condition

detection

No

loading

Mis-loading

EP

record loaded

LP

record

loaded

Note:

The

content

of

‘’Mis-loading”

in

this

table

is

different

from

that

of

“3.

EP

mis-loading

detection”

next

described.

3.

EP

mis-loading

detection

If

an

EP

record

is

loaded

by

error

into

the

LP

record

holder,

SW501

turns

on

and

its

output

signal

{at

“low”

level)

is

applied

to

pin

(D,)

of

the

microcomputer.

4,

Player

door

close

detection

Closing

the

player

door

causes

SW502

to

turn

on,

and

its

output

signal

{at

“low”

level)

is

applied

to

pin

(D,)

of

the

microcomputer.

—10—